Heat transfer enhancement in self-sustained oscillatory flow in a grooved channel with oblique plates

Korichi, Abdelkader; Oufer, Lounes; Polidori, Guillaume

doi:10.1016/j.ijheatmasstransfer.2008.09.013

Cited by 43 publications

(14 citation statements)

References 32 publications

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“…Domain extension technique is a concise and effective way to handle irregular domain problems, which had been successfully used for the computation of heat convection and transient heat conduction problems in a unitary domain containing both the solid and fluid regions. Korichi et al (2009) employed this method to solve the sudden changes of the thermophysical Fig. 4 The influence of CCR coefficient β * on the profiles of a the stretch ratio λ along the inletoutlet centerline, b the principal stress difference along the inletoutlet centerline, c the first normal stress difference N1 along the inlet-outlet centerline, and d the shear stress σ xy along the line y = 0.525; (v ¼ 5:0 mm s −1 ) properties at the solid-fluid interface.…”

Section: The Behavior Of Polystyrenes In Cross-slot Flowmentioning

confidence: 99%

Finite volume simulations of behavior for polystyrene in a cross-slot flow based on Rolie-Poly model

et al. 2016

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The flow behavior of polystyrenes is investigated numerically for a cross-slot geometry using Rolie-Poly model with finite extensibility, and governing equations for the polystyrene melts are solved by finite volume method with domain extension technique on the collocated grid. The effect of molecular weight, flow rate, and two kinds of Weissenberg numbers on the principal stress difference (PSD) profiles are discussed detailedly. The microstructures of polymer melts, including molecular orientation, extension, and deformation, are also investigated and presented in this paper. We found that the orientation of Weissenberg number is the major factor affecting the PSD profiles and the performance of the RoliePoly model has been improved greatly by introducing finite extensibility at high extension rate. The numerical results are consistent with the available experiment results, which demonstrate the capabilities of single-mode Rolie-Poly model with finite extensibility to simulate the flow behavior of polystyrenes and the numerical method developed in this paper.

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Section: The Behavior Of Polystyrenes In Cross-slot Flowmentioning

confidence: 99%

Finite volume simulations of behavior for polystyrene in a cross-slot flow based on Rolie-Poly model

et al. 2016

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“…Gholami et al [8] found that the wavy rectangular winglet vortex generator can significantly enhance heat transfer performance of the fin-and-tube compact heat exchangers. Installing the obstacles in the flow field is an effective way to improve the heat transfer performance [9]. An impingement flow was induced on the sidewall by the P-vortex flows and the inter-baffle cavity leaded a drastic increase of the heat transfer in channel [10].…”

Section: Introductionmentioning

confidence: 99%

Heat and fluid flow characteristics of a rectangular channel with a small diameter circular cylinder as vortex generator

Wang

Zhao

2015

International Journal of Thermal Sciences

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“…They also found that using larger diameter vortex generators and larger pitch space between the ribs increases wall heat transfer. Korichi et al [7] studied heat transfer enhancement in self-sustained oscillatory flow in a grooved channel with oblique plates on the opposite wall at 250 Re 1000 and analysed the fluid flow and heat transfer at different plate length, plate angle and Reynolds numbers. The presence of vortex generators at the upper surface was found to be a powerful mean to enhance the heat transfer compared to the basic grooved channel.…”

Section: Introductionmentioning

confidence: 99%

Effect of cylinder proximity to the wall on channel flow heat transfer enhancement

Cheraghi

Raisee

Moghaddami

2014

Comptes Rendus. Mécanique

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Heat-transfer enhancement in a uniformly heated slot mini-channel due to vortices shed from an adiabatic circular cylinder is numerically investigated. The effects of gap spacing between the cylinder and bottom wall on wall heat transfer and pressure drop are systemically studied. Numerical simulations are performed at Re = 100, 0.1 Pr 10and a blockage ratio of D/H = 1/3. Results within the thermally developing flow region show heat transfer augmentation compared to the plane channel. It was found that when the obstacle is placed in the middle of the duct, maximum heat transfer enhancement from channel walls is achieved. Displacement of circular cylinder towards the bottom wall leads to the suppression of the vortex shedding, the establishment of a steady flow and a reduction of both wall heat transfer and pressure drop. Performance analysis indicates that the proposed heat transfer enhancement mechanism is beneficial for low-Prandtl-number fluids.

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Heat transfer enhancement in self-sustained oscillatory flow in a grooved channel with oblique plates

Cited by 43 publications

References 32 publications

Finite volume simulations of behavior for polystyrene in a cross-slot flow based on Rolie-Poly model

Finite volume simulations of behavior for polystyrene in a cross-slot flow based on Rolie-Poly model

Heat and fluid flow characteristics of a rectangular channel with a small diameter circular cylinder as vortex generator

Effect of cylinder proximity to the wall on channel flow heat transfer enhancement

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